气候变化领域集成服务门户(CCPortal): Winter speed-up of quiescent surge-type glaciers in Yukon, Canada

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DOI	10.5194/tc-9-1183-2015
	Winter speed-up of quiescent surge-type glaciers in Yukon, Canada
	Abe T.; Furuya M.
发表日期	2015
ISSN	19940416
卷号	9 期号:3
英文摘要	Glacier surges often initiate in winter, but the mechanism remains unclear in contrast to the well-known summer speed-up at normal glaciers. To better understand the mechanism, we used radar images to examine spatial-temporal changes in the ice velocity of surge-type glaciers near the border of Alaska and the Yukon, focusing on their quiescent phase. We found significant accelerations in the upstream region from autumn to winter, regardless of surging episodes. Moreover, the winter speed-up propagated from upstream to downstream. Given the absence of surface meltwater input in winter, we suggest the presence of water storage near the base that does not directly connect to the surface, yet can promote basal sliding through increased water pressure. Our findings have implications for the modelling of glacial hydrology in winter, which may help us better understand glacier dynamics. © Author(s) 2015.
学科领域	glacial hydrology; glacier; glacier dynamics; meltwater; sliding; spatiotemporal analysis; water storage; Alaska; Canada; United States; Yukon Territory
语种	英语
scopus关键词	glacial hydrology; glacier; glacier dynamics; meltwater; sliding; spatiotemporal analysis; water storage; Alaska; Canada; United States; Yukon Territory
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119889
作者单位	Department of Natural History Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan
推荐引用方式 GB/T 7714	Abe T.,Furuya M.. Winter speed-up of quiescent surge-type glaciers in Yukon, Canada[J],2015,9(3).
APA	Abe T.,&Furuya M..(2015).Winter speed-up of quiescent surge-type glaciers in Yukon, Canada.Cryosphere,9(3).
MLA	Abe T.,et al."Winter speed-up of quiescent surge-type glaciers in Yukon, Canada".Cryosphere 9.3(2015).